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Idiopathic or Non-infectious Diseases of Salmon

Figure 13 (click for a larger view, 15.6 kilobytes)  Nephrocalcinosis. This condition is characterized by calcium accumulations in the kidneys. Some causes of nephrocalcinosis include improper diets and high levels of carbon dioxide in water.
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Figure 14 (click for a larger view, 20.2 kilobytes)  Lymphosarcoma in adult sockeye. These tumors have been observed in returning sockeye, and their cause is unknown. Courtesy of Keith Johnson.
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Figure 15 (click for a larger view, 24.0 kilobytes)  Gas bubble disease. Note gas bubbles in fins. This disease is caused due to supersaturation of nitrogen, and has occurred down stream from damns with high spill ways and deep plunge pools or in fish culture facilities using well water that is not properly "de-gassed".
(Download full resolution TIFF image, 3.0 megabytes) [Photo courtesy of Ralph Elston]